Severity Code Description Project File Line Suppression State Error MSB4100 Expected "$([System.String]::Copy('%(Identity)').EndsWith('.resources.dll'))" to evaluate to a boolean instead of "$([System.String]::Copy('C:\Users\tarek\OneDrive\Desktop\StoreAp

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Severity Code Description Project File Line Suppression State Error MSB4100 Expected "$([System.String]::Copy('%(Identity)').EndsWith('.resources.dll'))" to evaluate to a boolean instead of "$([System.String]::Copy('C:\Users\tarek\OneDrive\Desktop\StoreAp

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Severity Code Description Project File Line Suppression State

Error MSB4100 Expected "$([System.String]::Copy('%(Identity)').EndsWith('.resources.dll'))" to evaluate to a boolean instead of "$([System.String]::Copy('C:\Users\tarek\OneDrive\Desktop\StoreApi's\AllStoreApp\StoreClassLibrary\bin\Release\net8.0\StoreClassLibrary.dll').EndsWith('.resources.dll'))", in condition "!$([System.String]::Copy('%(Identity)').EndsWith('.resources.dll'))". StoreWeb C:\Program Files\dotnet\packs\Microsoft.NET.Runtime.WebAssembly.Sdk\8.0.3\Sdk\WasmApp.targets 339

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,426 Reputation points Microsoft External Staff

2024-05-08T06:02:19.49+00:00

On which platform do you have the problem? iOS, Android or Windows? What's the MAUI version? The error message mentioned "\Desktop\StoreApi's", is it on Windows platform? And the issue only occurs on release mode, right?

I noticed you added three tags for this thread, one is ASP.NET Core, one is .NET MAUI, is your project a .NET MAUI app using BlazorWebView?

Would you mind sharing the more detailed steps so that I can reproduce the issue?
MariMars 0 Reputation points

2025-06-11T17:14:16.35+00:00

This is wayyy to late but I just ran into the same issue. Its caused by the apostrophe in your file path "StoreApi's" rename the folder to fix it. The apostrophe isnt a typical character and isnt handled causing the filepath to be invalid

1 answer

Your answer

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,426 Reputation points Microsoft External Staff

2024-05-08T06:02:19.49+00:00

On which platform do you have the problem? iOS, Android or Windows? What's the MAUI version? The error message mentioned "\Desktop\StoreApi's", is it on Windows platform? And the issue only occurs on release mode, right?

I noticed you added three tags for this thread, one is ASP.NET Core, one is .NET MAUI, is your project a .NET MAUI app using BlazorWebView?

Would you mind sharing the more detailed steps so that I can reproduce the issue?
MariMars 0 Reputation points

2025-06-11T17:14:16.35+00:00

This is wayyy to late but I just ran into the same issue. Its caused by the apostrophe in your file path "StoreApi's" rename the folder to fix it. The apostrophe isnt a typical character and isnt handled causing the filepath to be invalid

Answer 1

Cause:

This condition:

!$([System.String]::Copy('%(Identity)').EndsWith('.resources.dll'))

returns a string, not a Boolean, which MSBuild expects.

Why:

%(Identity) only works inside <ItemGroup> iterations — not with static paths.

✅

Fix It

Option 1 – Use in ItemGroup:

<IsNotResource>$([System.String]::Copy('%(Identity)').EndsWith('.resources.dll'))</IsNotResource>

</MyAssemblies>

</ItemGroup>

Option 2 – Use Property for Static Path:

</PropertyGroup>

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Severity Code Description Project File Line Suppression State Error MSB4100 Expected "$([System.String]::Copy('%(Identity)').EndsWith('.resources.dll'))" to evaluate to a boolean instead of "$([System.String]::Copy('C:\Users\tarek\OneDrive\Desktop\StoreAp

1 answer

Your answer